Spin Wave Mode of Edge-Localized Magnetic States in Nanographite Zigzag Ribbons

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概要

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• We consider the loxv-energy taaagnetic excitations of nanogratphite ribbons with zigzag edges.Tlte zigzag ribbotas possess alraaost [1;tt bands at the Ferraai level xvhich catrse a ferriraaagnetic sjcir'npolarization localized at tlae edge sites. The sjcirr xvave tmode of' tlais raaatgnetic state is iravestigatedby a randoraa phase approxirnation of the corresponding Htrlcbard tr?odel. This restrlt is trsed toderive ara effective Heisenberg unodel xvith ladder strttctttre. Although this systena has a spin'x gap(Haldane type), ottr analysis slaoxvs that the gap is sutaall and the tendency towards ferrirnag?aeticcorrelation at tlue edges is strong.

• 社団法人日本物理学会の論文
• 1998-06-15

著者

• FUJITA Mitsutaka

  Institute of Materials Science,University of Tsukuba

• Wakabayashi Katsunori

  Institute Of Materials Science University Of Tsukuba

• Manfred SIGRIST

  Yukawa Institute,Kyoto University

• Manfred Sigrist

  Yukawa Institute For Theoretical Physics Kyoto University

• Sigrist Manfred

  Yukawa Institute For Theoretical Phyasics Kyoto University

• Fujita Mitsutaka

  Institute Of Materials Science And Center For- Tsukuba Advanced Research Alliance (tara) University

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• Nonmagnetic Impurities in Spin Gap Systems
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• Spin Wave Mode of Edge-Localized Magnetic States in Nanographite Zigzag Ribbons
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• The Competition between the 0-and π-Phase Shift in the Pb-Sr2RuO4-Pb Junction
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